<template>
	<view class="payment-pages">
	
		<view class="payment u-skeleton">
			<!-- Header -->
			<view class="payment-header">
				<price-format 
				  class="u-skeleton-fillet"
				  :subscript-size="40" 
				  :first-size="56" 
				  :second-size="40"
				  :price="amount" 
				  :weight="500"
				/>
				<template v-if="timeout > 0">
					<view class="payment-count-down">
						<text>支付剩余时间</text>
						<u-count-down 
						  :timestamp="timeout"
						  :show-days="false"
						  :show-hours="false"
						  :font-size="22"
						/>
					</view>
				</template>
			</view>
			
			<!-- Main -->
			<view class="payment-main">
				<view class="payway-container u-skeleton-fillet flex">
					<!-- Payway -->
					<u-radio-group v-model="payway" class="flex-1">
						<view class="payway">
							<view 
							class="payway-item"
							v-for="(item, index) in paywayList"
							:key="item.id"
							@click="changePayway(item.pay_way)"
							>
								<u-image 
								:src="item.image" 
								width="48" 
								height="48" 
								mode="scaleToFill" 
								/>
								<view class="payway-item-content">
									<text class="payway-item-content-name">{{ item.name }}</text>
									<text class="payway-item-content-tips">{{ item.extra }}</text>
								</view>
								<u-radio shape="circle" :name="item.pay_way" :active-color="colorConfig.primary" />
							</view>
						</view>
					</u-radio-group>
					<template v-if="!paywayList.length">
						<view class="payway-empty">暂无支付方式</view>
					</template>
				</view>
			</view>
			<loading-view v-if="loadingPay"></loading-view>
			<!-- Footer -->
			<view class="payment-footer">
				<view :class="['payment-submit', {'payment-submit--disabled': loadingPay}]" @tap="handlePrepay">
					<!-- <u-loading mode="circle" :show="loadingPay" /> -->
					<text v-show="!loadingPay">立即支付</text>
				</view>
			</view>
			
		</view>
		
		<u-skeleton :loading="loadingSkeleton" :animation="true" bgColor="#FFF" />
	</view>

</template>


<script>
	/**
	 * @description 支付页面
	 * @query {String} from 订单来源: order-商品订单; recharge-充值订单;
	 * @query {Number} order_id	订单ID
	 */
	import { prepay, getPayway } from '@/api/app'
	import { wxpay, alipay } from '@/utils/pay'
	
	export default {
		name: 'Payment',
		
		data() {
			return {
				from: '',				// 订单来源
				order_id: '',			// 订单ID
				amount: 0,				// 支付金额
				timeout: 0,				// 倒计时间戳
				payway: '',				// 支付方式
				paywayList: [],			// 支付方式列表
				
				loadingSkeleton: true,	// 骨架屏Loading
				loadingPay: false,		// 支付处理中Loading
			}
		},
		
		methods: {
			// 更改支付方式
			changePayway(value) {
				this.$set(this, 'payway', value)
			},
			
			// 初始化页面数据
			initPageData() {
				// 获取支付方式
				getPayway({
					from: this.from,
					order_id: this.order_id,
				}).then(res => {
					if (res.code != 1) throw new Error(res.msg)
					return res.data
				}).then(data => {
					this.loadingSkeleton = false
					this.amount = data.order_amount
					this.paywayList = data.pay_way
					this.payway = this.paywayList[0]?.pay_way
					// 倒计时
					const startTimestamp = new Date().getTime()
					const endTimestamp = data.cancel_time
					this.timeout = endTimestamp - (startTimestamp / 1000)
				}).catch(err => {
					throw new Error(err)
				})
			},
			
			// 预支付处理
			handlePrepay() {
				if (this.loadingPay) return
				this.loadingPay = true
				prepay({
					from: this.from,
					order_id: this.order_id,
					pay_way: this.payway,
				}).then(({ code, data }) => {
					switch(code) {
						case 1: 
							this.handleWechatPay(data); 
							break;
						case 10001: 
							this.handleAlipayPay(data); 
							break;
						case 20001: 
							this.handleWalletPay(); 
							break;
					}
				}).catch(err => {
					
				}).finally(() => {
					setTimeout(() => {
						this.loadingPay = false
					}, 500)
				})
			},
			
			// 微信支付
			handleWechatPay(data) {
				wxpay(data).then(res => {
					console.log(res)
					this.handPayResult(res)
				}).catch(err => {
					console.log(err)
				})
			},
			
			// 支付宝支付
			handleAlipayPay(data) {
				alipay(data).then(res => {
					console.log(res)
					this.handPayResult(res)
				}).catch(err => {
					console.log(err)
				})
			},
			
			// 钱包余额支付
			handleWalletPay() {
				console.log('支付成功')
				//余额支付成功
				this.handPayResult('success')
			},
			
			// 支付后处理
			handPayResult(result) {
				// 页面出栈
				//记录支付结果
				this.result = result
				console.log("result",this.result)
				uni.navigateBack()
				this.$Router.back(1)
				
			}
		
		},
		
		onLoad() {
			const options = this.$Route.query
			const from = options?.from || 'trade'
			const order_id = options?.order_id
			
			try {
				if (!from && !order_id) throw new Error('页面参数有误')
				this.from = from
				this.order_id = order_id
				this.initPageData()
			} catch(err) {
				console.log(err)
				// uni.navigateBack()
				this.$Router.back()
			}
		},
		onUnload() {
			switch(this.result) {
				case 'success': 
					uni.$emit('payment', { result: true, order_id: this.order_id, from: this.from }); 
					break;
				case 'fail':
				default: uni.$emit('payment', { result: false, order_id: this.order_id, from: this.from })
			}
		}
	}
</script>


<style lang="scss">
	page {
		height: 100%;
		padding: 0;
	}
	.payment-pages {
		height: 100%;
		.payment {
			display: flex;
			flex-direction: column;
			height: calc(100% - env(safe-area-inset-bottom));
			
			&-header {
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				height: 300rpx;
				background-color: #00632B;
				// background: linear-gradient(270deg, #00632B 0%, #F95F2F 100%);
				color: #FFFFFF;
			}
			
			
			&-main {
				flex: 1;
				margin-top: -40rpx;
				padding: 0 20rpx;
				overflow: hidden;
			}
			
			
			&-footer {
				display: flex;
				align-items: center;
				height: 100rpx;
				padding: 0 20rpx;
				background-color: #FFFFFF;
			}
			
			.payway-container {
				padding: 0 20rpx;
				border-radius: 7px;
				background-color: #FFFFFF;
				
				.payway-empty {
					display: flex;
					justify-content: center;
					padding: 20rpx 0;
					font-size: 26rpx;
					color: $-color-muted;
				}
			}
			
			.payway {
				width: 100%;
				
				&-item {
					display: flex;
					align-items: center;
					height: 120rpx;
					&:nth-child(n+2) {
						border-top: $-dashed-border;
					}
					
					&-content {
						flex: 1;
						display: flex;
						flex-direction: column;
						margin-left: 16rpx;
						
						&-name {
							font-size: 28rpx;
							color: $-color-black;
						}
						
						&-tips {
							font-size: 22rpx;
							color: $-color-muted;
						}
					}
				}
			}
			
			&-count-down {
				display: flex;
				justify-content: center;
				align-items: center;
				padding: 7rpx 25rpx;
				border-radius: 60px;
				margin-top: 10rpx;
				font-size: 22rpx;
				background-color: #FFFFFF;
				color: $-color-normal;
			}
			
			&-submit {
				flex: 1;
				position: relative;
				display: flex;
				justify-content: center;
				align-items: center;
				height: 74rpx;
				font-size: 28rpx;
				border-radius: 60px;
				background-color: #00632B;
				// background: linear-gradient(270deg, #00632B 0%, #F95F2F 100%);
				color: #FFFFFF;
				
				&--disabled::before {
					position: absolute;
					top: 0;
					bottom: 0;
					left: 0;
					right: 0;
					height: 100%;
					display: block;
					content: "";
					background: rgba(255, 255, 255, .3) !important;
				}
			}
			
			
		}
	}
	
</style>
